The show focuses on a group of students who are preparing for the exam that will determine their future.

Jing Zhihui was one of the best students of the grade. But because of an accident, Jing failed the placement test and was placed into the worst class of the grade which is called The K Class of Senior Three. At first, Jing was looking down on the classmates around her and was refusing to get along with them. But as the time went on, Jing started to realize the good sides of her classmates and unknowingly became a part of the class. During this period of time, her relationship with Xie Jingyuan who is the boy she's into have made a great progress. Together, they will face Nationwide Unified Examination for Admissions to General Universities and Colleges and determine their own future.—Yang Ge